Akathisia is probably the most common and one of the most distressing of the movement disorders associated with antipsychotic drugs. Little is known about its prevalence and its risk factors in real-world psychotic and bipolar patients to date.

The main objective of this study was to determine the prevalence of akathisia and to determine the risk factors and the treatments associated with it in a sample of Tunisian patients with schizophrenia, schizoaffective or bipolar disorder.

Seventy-four patients with schizophrenia, schizoaffective or bipolar disorder were included and assessed with a validated scale: the Barnes Akathisia scale (BAS). Ongoing psychotropic treatments were recorded.

The global prevalence of akathisia (as defined by a score ≥ 2 on the global akathisia subscale of the BAS) was 20.5%. Akathisia was significantly more common in patients with schizophrenia or schizoaffective disorder than in patients with Bipolar disorder (27.5% vs 9.4%; P = 0.049). However, the prevalence of akathisia did not differ according to sex, age, the illness duration, the presence of a comorbid anxiety disorder, the number of antipsychotics used, the type of the used antipsychotic (first vs second-generation), the antipsychotic chlorpromazine-equivalent total dosage, the use of benzodiazepines or anticholinergics, or the reported drug compliance.

Akathisia seems to be more common in some psychiatric disorders than in others such as schizophrenia or schizoaffective disorder. Longitudinal studies would be required to draw any firm conclusions concerning the factors involved in the emergence of akathisia.

The authors have not supplied their declaration of competing interest.